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RE: Adding new disk to volume group



Hi,

Here are the steps you need to do (they should be fine, but
Let me know if you have any issues, and the associated error
Because I might have missed something):

Step 1. create a partition on your new disk:

# fdisk /dev/cciss/c0d1

Once within fdisk, type the following (what you enter is between <> )

Command (m for help): <n>

Command action
   e   extended
   p   primary partition (1-4)

<p>

Partition number (1-4):
<1>

First cylinder (1- ...): <press enter to select default>
Last cylinder ... : <press enter to select default>

Now, you will find yourself back at the main prompt. You will want to
now
Change the partition's ID to Linux LVM

Command (m for help): <t>

Hex code (type L to list codes): <8e>

<w> - to write the partition table.

Now you should be back in the shell.



Step 2. create a new physical volume:

# pvcreate /dev/cciss/c0d1p1 (I think this is what it should be if you
have only made one single partition on the new disk).


Step 3. Add your new physical volume to your existing volume group

# pvextend VolGroup00 /dev/cciss/c0d1p1

Assuming the above worked, if you now type "vgdisplay -v", you should
see two 
physical volumes at the bottom of the output, and an increase in
capacity of 
In the following line:  "Free  PE / Size       98 / 3.06 GB"


Regards,
Geofrey Rainey.


-----Original Message-----
From: Kory Wheatley [mailto:wheakory isu edu] 
Sent: Thursday, 27 September 2007 9:48 a.m.
To: Geofrey Rainey
Cc: General Red Hat Linux discussion list
Subject: Re: Adding new disk to volume group

fdisk -l

Disk /dev/cciss/c0d0: 36.4 GB, 36414750720 bytes
255 heads, 32 sectors/track, 8716 cylinders Units = cylinders of 8160 *
512 = 4177920 bytes

           Device Boot      Start         End      Blocks   Id  System
/dev/cciss/c0d0p1               1           2        8144    4  FAT16
<32M
/dev/cciss/c0d0p2   *           3          52      204000   83  Linux
/dev/cciss/c0d0p4             285        8716    34402560    f  W95 
Ext'd (LBA)
/dev/cciss/c0d0p5             285        8064    31742384   8e  Linux
LVM
/dev/cciss/c0d0p6            8065        8578     2097104   82  Linux
swap

Disk /dev/cciss/c0d1: 36.4 GB, 36414750720 bytes
255 heads, 32 sectors/track, 8716 cylinders Units = cylinders of 8160 *
512 = 4177920 bytes

Disk /dev/cciss/c0d1 doesn't contain a valid partition table

[root lx6 cciss]# vgdisplay -v
    Finding all volume groups
    Finding volume group "VolGroup00"
    Fixing up missing format1 size (30.27 GB) for PV /dev/cciss/c0d0p5
  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  7
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                5
  Open LV               5
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               30.25 GB
  PE Size               32.00 MB
  Total PE              968
  Alloc PE / Size       870 / 27.19 GB
  Free  PE / Size       98 / 3.06 GB
  VG UUID               psKZl5-5omn-3pqG-S6Ip-i4wR-9OGc-7LSmbP

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol00
  VG Name                VolGroup00
  LV UUID                Sng7Z5-PTPx-snkr-nAzW-PkKz-LkUt-7TZTaS
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                4.00 GB
  Current LE             128
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:0

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol01
  VG Name                VolGroup00
  LV UUID                nDG0HT-xL9G-xD9D-emyJ-g4mf-huCj-SOvgnz
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                5.00 GB
  Current LE             160
  Segments               2
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:1

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol02
  VG Name                VolGroup00
  LV UUID                P9cXHo-BttJ-IHgo-b8Vw-xPjM-ncxA-Vjcv08
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.00 GB
  Current LE             32
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:2

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol03
  VG Name                VolGroup00
  LV UUID                lDHKwJ-Y0Lf-3SR4-NoNr-ZjN2-cH4O-B8718x
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                4.00 GB
  Current LE             128
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:3

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol04
  VG Name                VolGroup00
  LV UUID                jS7ech-ru2u-08JG-ulZp-sPbr-lfSV-2FsCCO
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                13.19 GB
  Current LE             422
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:4

  --- Physical volumes ---
  PV Name               /dev/cciss/c0d0p5
  PV UUID               NTkXuW-R4CJ-HqxT-WYAp-hOjb-8YTB-1Fj0vL
  PV Status             allocatable
  Total PE / Free PE    968 / 98

One volume group was only setup  "VolGroup00"

Geofrey Rainey wrote:
> Hello,
>
> Firstly, please answer these two questions:
>
> 1. what do you see with this command:
>
> # fdisk -l
>
> 2. How many volume groups do you have? (you can find this information 
> With the following command. The -v flag will give more verbose output 
> including the logical volumes associated with each volume group):
>
> # vgdisplay -v
> 		
> Regards,
> Geofrey Rainey
>
> -----Original Message-----
> From: redhat-list-bounces redhat com
> [mailto:redhat-list-bounces redhat com] On Behalf Of Kory Wheatley
> Sent: Thursday, 27 September 2007 8:51 a.m.
> To: General Red Hat Linux discussion list
> Subject: Adding new disk to volume group
>
> Currently I'm using Red Hat Enterprise 4 that has two disk on a 
> Hardware Raid 1 (Smart Array 5i controller) that is setup in  a Volume

> Group
> (VolGroup00) with the following logical volumes LogVol00, LogVol01, 
> LogVol02, LogVol03, LogVol04, and LogVol05.    I recently added two
more
>
> disks in our system/server  (these are internal disks on a HP Proliant

> DL380 g2) and set these disk as a Hardware Raid 1.  Now I haven't used

> Fdisk or nothing on these new disks.
>
> Here's my question:  How do I add the new disks to the already 
> existing Volume Group so that I can have more space on the Volume 
> Group.  Being a
> Raid1 I know your only adding one disk.  Could someone send me the 
> exact commands to use?
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